SharePoint 2010 SP2 - added " Required Field" to title attribute in forms

We have several web front end boxes to which we are "rolling" SP2010 SP2. After rolling this update to a few of the servers, we began to experience an odd issue. In a list form (newform.aspx), the data in the date field in the form intermittently couldn't be retrieved during the PreSaveAction() call (being called via javascript in a CEWP). We noticed that sometimes (depending on which WFE was serving the page) field's title had " Required Field" concatenated to the field name. Because the javascript was referencing the field name (only) when trying to retrieve data, it could not find the field when the user happened to be accessing one of the servers that has SP2 installed. This has been fixed with a simple update to our javascript. However, the issue we are now seeing is that of the servers that have SP2 installed, only one of them is actually showing the " Required Field" update. If the 2 servers have the same SP installed, why would one show the title of the field with " Required Field" and one would not? These are both Windows 2008 servers.